Greg Moreland with MTI Micro-Fuel Cells in Albany, New York, says his company is designing a fuel cell, currently about the size of a thick paperback book, which will eventually power mobile phones.

• 毕尔说：“我们确实很兴奋，在我们的家乡康乃迪克州已经有一辆燃料电池公共汽车在行驶，我们刚刚宣布有一部燃料电池公共汽车也在比利时行驶。”